Internal-combustion engine.



APPLICATION FILED APR. 10. 1917- Patented Feb. 19, 1918 (Z9 4 y/e -20 EP'vwZ 7 2' mscer' 3&1; L b GU01 11213 9 j .VX\\ 0 y 7 a 7 1 M w 4 z x w 5 W MW j 5 6 2&2

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ERNEST A. PIRSCHER, OF NEW YORK, N. Y., ASSIGNOR T AMERICAN SLEEVE-VALVE MOTOR COMPANY, OF PHILADELPHIA, PENNSYLVANIA, A CORPORATION WARE.

OF DELA- INTERNAL-COMBUSTION ENGINE.

Specification of Letters Patent.

Patented Feb. 19, 1918..

Application tiled April 10, 1917. Serial No. 160,906.

I To all whom it may concern:

sleeve valve Be it known that I, ERNEST A. PIRSCHER, a citizen of the United States of America, residing at 412 Audubon avenue, borough of Manhattan, in the city, county, and State of New York, have invented new and useful Improvements in Internal-Combustion Engines, of which the following is a specification.

My invention relates to internal combustion engines, articularly of the type which have a cylin er, or plurality of cylinders, provided with lateral ports, and a revoluble disposed within the cylinder and arranged to cover and uncover the ports, the working piston being arranged to reciprocate within the sleeve valve.

The object of my invention is an improvement in the means for retaining compression within the cylinder in such an engine, by the use of which the gases are more effectively kept within the cylinder duringthe compression and working strokes of the piston, and the friction between the revolving sleeve valve and the stationary parts with which it is in contact is reduced to a mini-' mum. To accomplish this end, I make use of a split compression shell, having a broad external rubbing surface, which I dispose within the revoluble sleeve valve in much the same manner as is known in the art; and in addition I provide means for preventing the gases of combustion from coming in contact with and exerting pressure on the interior surface of the compression shell. A further object of my invention is to provide simple means for preventing the gases from escaping by passing through the split of the compression shell.

My invention then consists in the construction, combination and arrangement of parts herein illustrated, described and claimed.

In the accompanying drawings forming part'hereof, which show my invention embodied in a single cylinder engine, and in whichv like reference characters designate corresponding parts in all views,

Figure 1 is a section through the axis of a cylinder of an internal combustion engine taken at right angles to the axis of the crank shaft;

-Fig. 2 is a detail in section of a cylinder head and compression shell; and,

- shown) Fig. 3 is a perspective view of a compression shell.

In these drawings I have shown a cylinder 1, provided with the usual jacket 2 for the circulation of the cooling water, and mounted upon a crank case 3. Disposed within the cylinder 1 is a sleeve valve 4 arranged to be revolved within the cylinder, and suitably supported as upon the web 5 of the crank case 3. Arranged to reciprocate within the sleeve valve 4 is a piston 6 to which is connected a rod 7 arranged to transmit power to the crank shaft 8.

Suitable means are arranged for revolving the sleeve valve 4 at speeds proportionate to the crank shaft speed, which ma be the sprocket wheel 9 keyed to the crank s aft 8 and driving, through the chain 10, the sprocket wheel 11 which is keyed to a countershaft 12, from which shaft through a gear or worm (not shown) meshing with the gear wheel 13, the sleeve valve 4 keyed to said gear wheel 13 is driven.

The cylinder 1 is provided with an intake port 14, and a similar exhaust port (not shown) and the sleeve valve 4 is provided with an opening 15 arranged to be brought into coincidence with one or other of these ports at the propermoment to effect the opening thereof.

The cylinder head 16 is arranged to project into the cylinder and within the valve 4 beyond the port 14, and is provided with a passage 17 disposed in line with the port 1.4 to permit of the passage of gases from the port 14 into the cylinder; and a similar passage through the cylindcr head is provided in alinement with the exhaust port (not The head 16 may be provided with a chamber 18 for cooling water.

In order to prevent the gases On compression or after combustion from escaping from the cylinder between the stationary cylinder head and the revolving valve 4, a compression-shell 20 is disposed between the said cylinder head and valve. This compression shell is provided with ports 21 and 22 corresponding to the intake and exhaust ports of the cylinder mentioned, and is held in position against rotary movement by a pin or projection on the cylinder head fitting into the hole or slot 23 of the compression shell. The compression shell is split at 24 and has a tendency to expand against the inner surface of the valve 4, thus preventi'n the gases from passing up between the shel itself and the valve 4. The shell is made of considerable Width in order to afford a large bearing surface and reduce the wear on the inner. surface of the valve 4, and is preferably of about the same length as the cylindrical portion-of the cylinder head projecting into the cylinder, and should not extend into the cylinder farther than the cylinder head.

The inner surface of the shell 20 is provided with a series of ribs, Which are preferably formed in the shape of a square thread 25, and the exterior of the cylinder head 16 Where it projects Within the cylinder is provided with a corresponding series of ribs, or'

a square thread 26. When the shell is in place upon the cylinder head, these ribs or threads fit into one another, and effectually prevent the passage of the gases between the shell and the cylinder head, and at the same time avoid the possibility of gases getting behind the shell, and exerting a pressure on the interior surface thereof, which would tend to greatly increase the pressure of the shell against the sleeve valve 4, and would result in great friction and rapid Wear.

In order to prevent the passage of the gases through the split 2-1:, slots or notches 27 are cut in the shell 20 at each side of the split 24, and directly opposite one another, and members 28 having the same thickness as the shell 20, and of a width equal to the width of the slots 27, are dropped in place in these slots. In orderto keep these members in contact with the rcvoluble valve 4, a packing ring 29 Which is split and made with a tendency to expand is disposed in a groove of the cylinder head immediately behind the members 28, and thus holds them in position and also prevents the gases from passing up behind these members. I

Having now described my invention, I claim and desire to secure by Letters Patent.

1. In an internal combustion engine, the

combination, comprising a laterally ported cylinder member; a revoluble sleeve valve member arranged to cover and uncover the ports; a piston reciprocable within said sleeve valve; a compression shell disposed between said cylinder and valve members and fixed with relation to one of said members and having a surface bearing against the other to form a gas-tight packing, and interlocking'ribs on said shell and the member'to which said shell is fixed adapted to 0bstruct the passage of gases between the shell and member.

2. In an internal combustion engine, the combination comprising a cylinder having lateral ports; a revoluble sleeve valve disposed in said cylinder and arranged to cover and uncover said ports; a piston reciprocable within said sleeve valve; a head disposed on said cylinder and projecting Within said sleeve valve beyond said ports, and provided with passages leadingfrom said ports to the interior of said cylinder; a series of circumferential ribs formed on said head; a split compression shell encircling the portion of said cylinder head containing said passages and adapted to bear outwardly against said sleeve valve; and a series of ribs formed on the inner surface of said sleeve adapted to engage said ribs on the cylinder head to obstruct the passage of gases between said head and sleeve.

8. In aninternal combustion engine, the combination comprising a cylinder having lateral ports; a revoluble sleeve valve disposed in said cylinder and arranged to cover and uncover said ports; a piston reciprocable within said sleevevalve; a head disposed on said cylinder having an externally threaded cylindrical portion projecting within said sleeve valve beyond said ports, and provided with passages leading from said ports to the interior of said cylinder; :1 split compression shell encircling the portion of said cylinder head containing said passages and adapted-to bear outwardly against said sleeve valve, and provided with an internal screw thread meshing with said thread of the cylinder head.

4. In an internal combustion engine, the combination comprisin a cylinder having lateral ports; a revolu le sleeve valve disposed in saidcylinder and arranged to cover and uncover said ports; a piston reciprocable within said sleeve valve; a head disposed on said cylinder having a cylindrical portion projecting within said sleeve valve beyond ports, and provided with passages leading der, said cylindrical portion having a square thread formed on its external surface; and a split compression shell encircling the portion of said cylinder head containing said passages and adapted to bear outwardly against said sleeve valve, and provided With an internal square thread meshing With said thread of the cylindrical portion.

5. In an internal combustion engine, the combination comprisin a cylinder having lateral ports; a revoluble sleeve valve disposed in said cylinder and arranged to cover and uncover said ports; a piston reciprocable within said sleeve valve; a head disposed on said cylinder and pro ecting within said sleeve valve beyond said ports, and provided With passages leading from said ports to the interior of said cylinder; a split compression shell encircling the portion of said cylinder head containing said passages and adapted to bear outwardly against said sleeve valve, said shell having opposed slots at each side of the split, and members dis-' posed in said slots extending across the split.

6. In an internal combustion engine, the combination comprising a cylinder having lateral ports; a revoluble sleeve valve disposed in said cylinder and arranged to cover and uncover said ports; a piston reciprocable within said sleeve valve; a head dis posed on said cylinder and projecting within said sleeve valve beyond said ports, and provided. with passages leading from said ports to the interior of said cylinder; a split compression shell encircling the portion of said cylinder head containing said passages and adapted to bear outwardly against said sleeve valve; means to prevent the gases of combustion from exerting pressure on the inner surface of said compression shell; said shell having opposed slots at each side of the split; and members disposed in said slots extending across the split.

7. In an internal combustion engine, the combination, comprising a laterally ported cylinder member; a revoluble sleeve valve member arranged to cover and uncover the ports; a piston reciprocable within said sleeve valve; a split compression shell disposed between said cylinder and valve members, said shell havin opposed slots at each side of the split, an members disposed in said slots extending across the split.

In testimony whereof I have signed my a name to this specification,

ERNEST A. PIRSCHER. 

